Fix Constructor#serializationCopy
Added new Constructor#newInstanceFromSerialization
method that's used to implement #newInstance on
Constructor instances created by the #serializationCopy.
+ Restored ArtField::GetOffset missing DCHECK and
fixed debug build use of GetOffset to GetOffsetDuringLinking
in the class_linker.cc.
Bug: 24764403
Change-Id: I74bdf6a850bf9770ec51bf9a4421541d505de8ad